Vertical boiler



PATENTED JAN 5, 1904.

SPENCER VERTICAL BOILER.

APPLICATION FILED MAR. 2, 1903.

110 MODEL.

THE wonms PETERS co mm'aumou'vmsuwa'rum u. c,

' INITED STATES V Patented January 5, 1904.

PATENT Fri.

VERTICAL BOlLER.

SPECIFICATION forming part of Letters Patent No. 748,806,dated January 5, 1904.

Application filed March 2, 1903. Serial No. 145,703. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE FANTON SPEN- CER,a citizen of the United States of America, residing at Thompson, in the county of Susquehanna and State of Pennsylvania, have invented certain new and useful Improve-' ments in Vertical Boilers, of which the following is a specification, reference being bad therein to the accompanying drawings.

This invention relates to certain new and useful improvements in vertical boilers, and more specifically bears relation to an improved upperand lower head and base used in conjunction therewith and is an improvement upon my invention as set forth in Letters Patent, granted to me March 12, 1889, No. 399,443.

The invention aims to reduce the depth of the top or upper head sufficiently to allow for a smoke chamber which will not extend above the ordinary height of the head and which smoke-chamber will be so positioned as to permit of utilization of the heat contained within the products of combustion in conjunction with the steam-dome previous to the exhaust of the said product. By providing a reduced upper head I not only materially shorten the height of the boiler, but also enable a more expeditious introduction of fuel, which is received at the top of the boiler.

The accompanying drawings illustrate a practical embodiment of the invention, and in referring to the same like characters of reference will be employed for designating similar parts throughout the several views, in which Figure 1 is a vertical sectional view on line 2 2 of Fig. 2. Fig. 2 is a top plan view. Fig.

3 is a horizontal section on line 3 3 of Fig. 1,

and Fig. 4 is a front elevation of the waterjacketed doorway.

The upper head is formed of a drum 2, having top and bottom walls 3 l, respectively, the drum having openings arranged approximately central thereof which extend through the top and bottom walls to provide a steamspace. The upper wall of the drum is preferably formed with an upwardly-extending annular neck 5, forming on its interior the steam-dome and on its exterior one wall of the smoke-chamber, as will be further perceived. A magazine 6 is preferably-arranged centrally within the boiler and which extends through the said steam-s pace, the openings in the walls of the drum being of a size considerably larger than the magazine. The outer sides of the magazine form one of the walls of the steam-chamber, the magazine being connected to the steam-dome by an intervening portion 7 which may or may not be formed integral therewith, as desired.

This magazine, as shown, may be slightly contracted at its lower portion in order to provide for a more gradual feed of the coal to the fire and at its lower end extends outwardly in a substantially horizontal plane, as at 8, for a comparatively slight distance and is connected to a flaring portion 9, which extends and is suitably joined to the bottom wall of the drum 2, forming in conjunction with the outer wall of the magazine 6 a waterchamber. a

Seating upon the upper wall 3 of the steamdrum is an annular open collar 10, suitably joined to the boiler-casing and carrying an inwardly-extending portion 11, suitably formed to receive a closure 12, which is preferably constructed of a flat ring, and which engages about neck 5. The object of said closure 12 being made separate from open collar 10 is to facilitate cleaning or brushing the fire-lines at any time without the necessity of removing any part, save this light closure l2,so made for this express purpose. By this arrangement I not only provide a smokechamber between the steam-dome and the collar, but I utilize the heat derived from the products of combustion to circulate about the steam-dome and about the top of the drum, which tends to in crease the temperature of the steam, and thereby to a slightly perceptible extent superheat the same.

The lower head embraces a water-drum 12, which is connected to the stea m-drum through the medium of pipes 13, which communicate with the Water-drum 12' and the steam-drum 2, within these pipes and spaced therefrom being arranged fire-tubes 14, whose ends extend through the steam-drum 2 and the water-drum 12, forming a communication between the smoke-chamber and the soot-chamber 15. Arranged between these water-pipes 13 are baffle-plates 16, which extend for a distance below the bottom wall 4 of the steamdrum and permit the heat and gases to pass thereover and then downwardly in a direction toward the soot-chamber, from which they may then pass upwardly through the fire-fines 14 and from thence into the smokechamber. In order to create a draft from the combustion-chamber to the smoke-flue 17, I provide a series of short pipes 18, which extend through the top and bottom walls of the steam-drum 2, and thereby provide a direct draft for the fire-fines, these tubes, as will be perceived from Fig. 2 of the drawings, being arranged adjacent the fire-flue and in such position as to create a direct draft when desired or may be stopped at pleasure by closing the damper over these.

35 designates a cover for the magazine.

The soot-chamber, as will be perceived, is positioned so as to receive any deposits from the products of combustion when the same are on their downward course previous to entering the fire-tubes let, and this soot-chamber I preferably form of an arc shape, there being an intervening space between its ends, so as to permit of the location of an ash-door of a large size, and in Fig. l of the drawings I have shown guides 19, formed of short lugs, which are spaced from the end of the sootchamber, and thereby permit the slidable insertion of a door 20 between the said lugs and the end of the soot-chamber, it being understood that these doors are two in number, one being arranged at each end of the soot-chamber, the latter, as just stated, extending but partly around the base.

In my improvementI employa water-jacket doorway, and referring to Fig. 1 of the drawings it will be perceived that the jacket is formed of a somewhat rectangular form, centrally arranged within which is the doorway 21, its four sides forming in conjunction with the three sides 22 of the jacket a waterchamber, thelatter being connected to the waterchamber of the boiler through the medium of a short pipe 23. A tube 24', which is located directly above the doorway, is connected to the steam-drum 2 and is not provided with a fire-tube, such as is the case with all the other water-tubes which extend downwardly from the steam-drum, for the reason that by the intervention of the doorway no communication with the lower head and the smokechamber can be conveniently formed; but said tube 24 serves the function of supplying a current of water downward through the water-jacket surrounding the doorway, and thus supplies the water for upward current prevailing in all the remaining water-tubes. I also desire to call attention to the fact that a water-jacket is formed about the magazine, which assists in a more thorough circulation of the water in the boiler.

The boiler-casing is preferably formed of an inner and outer member 25 26, respectively, which form a dead-air space therebetween, and thereby to a great extent obviate radiation of the heat. 27 represents the aperture formed for the steam-supply pipe. (Not shown.)

30 represents a ring which engages about the steam-dome and which is formed with a flat web portion 31, constituting a damper for controlling the direct-draft fiues 18, this ring seating on the upper face of drum 2.

It will be readily noted that water is contained within the water chamber and the lower head as well as the water-tubes, the level of the water of the latter of course being the same as that of the water-chamber. The products of combustion emanating from the fire-chamber will be conducted upwardly to a point adjacent the bottom of the steamdrum, since by reason of the termination of the baffle-plates at this point the said products will be permitted to pass downwardly about the water-tubes 13 into the soot-chamber and from thence upwardly through the fire-tubes 14, the latter communicating with the smoke-chamber, from which the products of combustion may readily egress. It will thus be noticed that heat is maintained on the interior of the water-tubes as well as the exterior thereof, which provides a very thorough radiation and greatly facilitates the production of steam.

The invention is capable of numerous alterations and variations without departing from the spirit and scope thereof, and I therefore do not wish to be limited to the details shown and described, since it is obvious that they may be readily deviated from.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A boiler embracing a steam-drum having a dome, fire-fines located about the dome and extending through the drum, a smokeohamber formed between the drum and dome, and having a removable closure whereby access may be had to said flues.

2. A boiler having a steam-drum with a dome thereon, a collar seating on the upper outer edge of the drum and extending flush with the top of the dome, and a ring interposed between the outer face of the dome and the upper end of the collar and supported on the latter.

3. A boiler having a steam-drum with a dome, a collar of the same height as the dome, seating on the upper outer edge of the drum, and a removable closure supported on the upper end of the collar and engaging the periphery of the dome.-

4:. A boiler having a steam-drum with a dome thereon,fire-flues extending through the drum and surrounding the dome, a collar on the dome forming the outer wall of the smokechamber and a removable closure supported by the collar and engaging the dome forming the top of the smoke-chamber and when removed permitting access to said fire-fines.

IIO

5. A boiler embracing a steam-drum having a dome, fire-fines extending through the drum and draft-fines extending through the drum, a smoke-chamber formed between the drum and dome and having aremovable closure whereby the draft-fines may be controlled and the fire-fines made accessible.

6. A boiler having a steam-drum and a dome, the dome constitutiu g a part of the top of the boiler, a collar surrounding the dome and seating on the drum and extending flush with the top of the former, and a removable closure supported on the collar and constituting the remaining portion of the top of the boiler, the closure and collar formed in 

